Shadow cap



FIG. 1 is a top plan view of a shadow cap showing my new design, the undisclosed bottom is not part of the claimed design;

FIG. 2 is a right side elevational view of a shadow cap showing my new design, the left side is a mirror image;

FIG. 3 is a front elevational view thereof; and,

FIG. 4 is a rear elevational view thereof. 

The ornamental design for a shadow cap, as shown and described. 